<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Flowchart</title>
<meta name="description" content="Interactive flowchart diagram implemented by GoJS in JavaScript for HTML." />
<!-- Copyright 1998-2019 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="../release/go.js"></script>
<script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
<script id="code">
  function init() {
    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    var $ = go.GraphObject.make;  // for conciseness in defining templates

    myDiagram =
      $(go.Diagram, "myDiagramDiv",  // must name or refer to the DIV HTML element
        {
          initialContentAlignment: go.Spot.Center,
          allowDrop: true,  // must be true to accept drops from the Palette
          "LinkDrawn": showLinkLabel,  // this DiagramEvent listener is defined below
          "LinkRelinked": showLinkLabel,
          scrollsPageOnFocus: false,
          "undoManager.isEnabled": true  // enable undo & redo
        });

    // when the document is modified, add a "*" to the title and enable the "Save" button
    myDiagram.addDiagramListener("Modified", function(e) {
      var button = document.getElementById("SaveButton");
      if (button) button.disabled = !myDiagram.isModified;
      var idx = document.title.indexOf("*");
      if (myDiagram.isModified) {
        if (idx < 0) document.title += "*";
      } else {
        if (idx >= 0) document.title = document.title.substr(0, idx);
      }
    });

    // helper definitions for node templates

    function nodeStyle() {
      return [
        // The Node.location comes from the "loc" property of the node data,
        // converted by the Point.parse static method.
        // If the Node.location is changed, it updates the "loc" property of the node data,
        // converting back using the Point.stringify static method.
        new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
        {
          // the Node.location is at the center of each node
          locationSpot: go.Spot.Center
        }
      ];
    }

    // Define a function for creating a "port" that is normally transparent.
    // The "name" is used as the GraphObject.portId,
    // the "align" is used to determine where to position the port relative to the body of the node,
    // the "spot" is used to control how links connect with the port and whether the port
    // stretches along the side of the node,
    // and the boolean "output" and "input" arguments control whether the user can draw links from or to the port.
    function makePort(name, align, spot, output, input) {
      var horizontal = align.equals(go.Spot.Top) || align.equals(go.Spot.Bottom);
      // the port is basically just a transparent rectangle that stretches along the side of the node,
      // and becomes colored when the mouse passes over it
      return $(go.Shape,
        {
          fill: "transparent",  // changed to a color in the mouseEnter event handler
          strokeWidth: 0,  // no stroke
          width: horizontal ? NaN : 8,  // if not stretching horizontally, just 8 wide
          height: !horizontal ? NaN : 8,  // if not stretching vertically, just 8 tall
          alignment: align,  // align the port on the main Shape
          stretch: (horizontal ? go.GraphObject.Horizontal : go.GraphObject.Vertical),
          portId: name,  // declare this object to be a "port"
          fromSpot: spot,  // declare where links may connect at this port
          fromLinkable: output,  // declare whether the user may draw links from here
          toSpot: spot,  // declare where links may connect at this port
          toLinkable: input,  // declare whether the user may draw links to here
          cursor: "pointer",  // show a different cursor to indicate potential link point
          mouseEnter: function(e, port) {  // the PORT argument will be this Shape
            if (!e.diagram.isReadOnly) port.fill = "rgba(255,0,255,0.5)";
          },
          mouseLeave: function(e, port) {
            port.fill = "transparent";
          }
        });
    }

    function textStyle() {
      return {
        font: "bold 11pt Helvetica, Arial, sans-serif",
        stroke: "whitesmoke"
      }
    }

    // define the Node templates for regular nodes

    myDiagram.nodeTemplateMap.add("",  // the default category
      $(go.Node, "Table", nodeStyle(),
        // the main object is a Panel that surrounds a TextBlock with a rectangular Shape
        $(go.Panel, "Auto",
          $(go.Shape, "Rectangle",
            { fill: "#00A9C9", strokeWidth: 0 },
            new go.Binding("figure", "figure")),
          $(go.TextBlock, textStyle(),
            {
              margin: 8,
              maxSize: new go.Size(160, NaN),
              wrap: go.TextBlock.WrapFit,
              editable: true
            },
            new go.Binding("text").makeTwoWay())
        ),
        // four named ports, one on each side:
        makePort("T", go.Spot.Top, go.Spot.TopSide, false, true),
        makePort("L", go.Spot.Left, go.Spot.LeftSide, true, true),
        makePort("R", go.Spot.Right, go.Spot.RightSide, true, true),
        makePort("B", go.Spot.Bottom, go.Spot.BottomSide, true, false)
      ));

    myDiagram.nodeTemplateMap.add("Conditional",
      $(go.Node, "Table", nodeStyle(),
        // the main object is a Panel that surrounds a TextBlock with a rectangular Shape
        $(go.Panel, "Auto",
          $(go.Shape, "Diamond",
            { fill: "#00A9C9", strokeWidth: 0 },
            new go.Binding("figure", "figure")),
          $(go.TextBlock, textStyle(),
            {
              margin: 8,
              maxSize: new go.Size(160, NaN),
              wrap: go.TextBlock.WrapFit,
              editable: true
            },
            new go.Binding("text").makeTwoWay())
        ),
        // four named ports, one on each side:
        makePort("T", go.Spot.Top, go.Spot.Top, false, true),
        makePort("L", go.Spot.Left, go.Spot.Left, true, true),
        makePort("R", go.Spot.Right, go.Spot.Right, true, true),
        makePort("B", go.Spot.Bottom, go.Spot.Bottom, true, false)
      ));

    myDiagram.nodeTemplateMap.add("Start",
      $(go.Node, "Table", nodeStyle(),
        $(go.Panel, "Auto",
          $(go.Shape, "Circle",
            { minSize: new go.Size(40, 40), fill: "#79C900", strokeWidth: 0 }),
          $(go.TextBlock, "Start", textStyle(),
            new go.Binding("text"))
        ),
        // three named ports, one on each side except the top, all output only:
        makePort("L", go.Spot.Left, go.Spot.Left, true, false),
        makePort("R", go.Spot.Right, go.Spot.Right, true, false),
        makePort("B", go.Spot.Bottom, go.Spot.Bottom, true, false)
      ));

    myDiagram.nodeTemplateMap.add("End",
      $(go.Node, "Table", nodeStyle(),
        $(go.Panel, "Auto",
          $(go.Shape, "Circle",
            { minSize: new go.Size(40, 40), fill: "#DC3C00", strokeWidth: 0 }),
          $(go.TextBlock, "End", textStyle(),
            new go.Binding("text"))
        ),
        // three named ports, one on each side except the bottom, all input only:
        makePort("T", go.Spot.Top, go.Spot.Top, false, true),
        makePort("L", go.Spot.Left, go.Spot.Left, false, true),
        makePort("R", go.Spot.Right, go.Spot.Right, false, true)
      ));

    myDiagram.nodeTemplateMap.add("Comment",
      $(go.Node, "Auto", nodeStyle(),
        $(go.Shape, "File",
          { fill: "#EFFAB4", strokeWidth: 0 }),
        $(go.TextBlock, textStyle(),
          {
            margin: 5,
            maxSize: new go.Size(200, NaN),
            wrap: go.TextBlock.WrapFit,
            textAlign: "center",
            editable: true,
            font: "bold 12pt Helvetica, Arial, sans-serif",
            stroke: '#454545'
          },
          new go.Binding("text").makeTwoWay())
        // no ports, because no links are allowed to connect with a comment
      ));


    // replace the default Link template in the linkTemplateMap
    myDiagram.linkTemplate =
      $(go.Link,  // the whole link panel
        {
          routing: go.Link.AvoidsNodes,
          curve: go.Link.JumpOver,
          corner: 5, toShortLength: 4,
          relinkableFrom: true,
          relinkableTo: true,
          reshapable: true,
          resegmentable: true,
          // mouse-overs subtly highlight links:
          mouseEnter: function(e, link) { link.findObject("HIGHLIGHT").stroke = "rgba(30,144,255,0.2)"; },
          mouseLeave: function(e, link) { link.findObject("HIGHLIGHT").stroke = "transparent"; },
          selectionAdorned: false
        },
        new go.Binding("points").makeTwoWay(),
        $(go.Shape,  // the highlight shape, normally transparent
          { isPanelMain: true, strokeWidth: 8, stroke: "transparent", name: "HIGHLIGHT" }),
        $(go.Shape,  // the link path shape
          { isPanelMain: true, stroke: "gray", strokeWidth: 2 },
          new go.Binding("stroke", "isSelected", function(sel) { return sel ? "dodgerblue" : "gray"; }).ofObject()),
        $(go.Shape,  // the arrowhead
          { toArrow: "standard", strokeWidth: 0, fill: "gray"}),
        $(go.Panel, "Auto",  // the link label, normally not visible
          { visible: false, name: "LABEL", segmentIndex: 2, segmentFraction: 0.5},
          new go.Binding("visible", "visible").makeTwoWay(),
          $(go.Shape, "RoundedRectangle",  // the label shape
            { fill: "#F8F8F8", strokeWidth: 0 }),
          $(go.TextBlock, "Yes",  // the label
            {
              textAlign: "center",
              font: "10pt helvetica, arial, sans-serif",
              stroke: "#333333",
              editable: true
            },
            new go.Binding("text").makeTwoWay())
        )
      );

    // Make link labels visible if coming out of a "conditional" node.
    // This listener is called by the "LinkDrawn" and "LinkRelinked" DiagramEvents.
    function showLinkLabel(e) {
      var label = e.subject.findObject("LABEL");
      if (label !== null) label.visible = (e.subject.fromNode.data.category === "Conditional");
    }

    // temporary links used by LinkingTool and RelinkingTool are also orthogonal:
    myDiagram.toolManager.linkingTool.temporaryLink.routing = go.Link.Orthogonal;
    myDiagram.toolManager.relinkingTool.temporaryLink.routing = go.Link.Orthogonal;

    load();  // load an initial diagram from some JSON text

    // initialize the Palette that is on the left side of the page
    myPalette =
      $(go.Palette, "myPaletteDiv",  // must name or refer to the DIV HTML element
        {
          scrollsPageOnFocus: false,
          nodeTemplateMap: myDiagram.nodeTemplateMap,  // share the templates used by myDiagram
          model: new go.GraphLinksModel([  // specify the contents of the Palette
            { category: "Start", text: "Start" },
            { text: "Step" },
            { category: "Conditional", text: "???" },
            { category: "End", text: "End" },
            { category: "Comment", text: "Comment" }
          ])
        });
  } // end init


  // Show the diagram's model in JSON format that the user may edit
  function save() {
    document.getElementById("mySavedModel").value = myDiagram.model.toJson();
    myDiagram.isModified = false;
  }
  function load() {
    myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
  }

  // print the diagram by opening a new window holding SVG images of the diagram contents for each page
  function printDiagram() {
    var svgWindow = window.open();
    if (!svgWindow) return;  // failure to open a new Window
    var printSize = new go.Size(700, 960);
    var bnds = myDiagram.documentBounds;
    var x = bnds.x;
    var y = bnds.y;
    while (y < bnds.bottom) {
      while (x < bnds.right) {
        var svg = myDiagram.makeSVG({ scale: 1.0, position: new go.Point(x, y), size: printSize });
        svgWindow.document.body.appendChild(svg);
        x += printSize.width;
      }
      x = bnds.x;
      y += printSize.height;
    }
    setTimeout(function() { svgWindow.print(); }, 1);
  }
</script>
</head>
<body onload="init()">
<div id="sample">
  <div style="width: 100%; display: flex; justify-content: space-between">
    <div id="myPaletteDiv" style="width: 100px; margin-right: 2px; background-color: whitesmoke; border: solid 1px black"></div>
    <div id="myDiagramDiv" style="flex-grow: 1; height: 750px; border: solid 1px black"></div>
  </div>
  <p>
  The FlowChart sample demonstrates several key features of GoJS,
  namely <a href="../intro/palette.html">Palette</a>s,
  <a href="../intro/links.html">Linkable nodes</a>, Drag/Drop behavior,
  <a href="../intro/textBlocks.html">Text Editing</a>, and the use of
  <a href="../intro/templateMaps.html">Node Template Maps</a> in Diagrams.
  </p>
  <p>
  Mouse-over a Node to view its ports.
  Drag from these ports to create new Links.
  Selecting Links allows you to re-shape and re-link them.
  Selecting a Node and then clicking its TextBlock will allow
  you to edit text (except on the Start and End Nodes).
  </p>
  <button id="SaveButton" onclick="save()">Save</button>
  <button onclick="load()">Load</button>
  Diagram Model saved in JSON format:
  <textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
  "linkFromPortIdProperty": "fromPort",
  "linkToPortIdProperty": "toPort",
  "nodeDataArray": [
{"category":"Comment", "loc":"360 -10", "text":"Kookie Brittle", "key":-13},
{"key":-1, "category":"Start", "loc":"175 0", "text":"Start"},
{"key":0, "loc":"-5 75", "text":"Preheat oven to 375 F"},
{"key":1, "loc":"175 100", "text":"In a bowl, blend: 1 cup margarine, 1.5 teaspoon vanilla, 1 teaspoon salt"},
{"key":2, "loc":"175 200", "text":"Gradually beat in 1 cup sugar and 2 cups sifted flour"},
{"key":3, "loc":"175 290", "text":"Mix in 6 oz (1 cup) Nestle's Semi-Sweet Chocolate Morsels"},
{"key":4, "loc":"175 380", "text":"Press evenly into ungreased 15x10x1 pan"},
{"key":5, "loc":"355 85", "text":"Finely chop 1/2 cup of your choice of nuts"},
{"key":6, "loc":"175 450", "text":"Sprinkle nuts on top"},
{"key":7, "loc":"175 515", "text":"Bake for 25 minutes and let cool"},
{"key":8, "loc":"175 585", "text":"Cut into rectangular grid"},
{"key":-2, "category":"End", "loc":"175 660", "text":"Enjoy!"}
 ],
  "linkDataArray": [
{"from":1, "to":2, "fromPort":"B", "toPort":"T"},
{"from":2, "to":3, "fromPort":"B", "toPort":"T"},
{"from":3, "to":4, "fromPort":"B", "toPort":"T"},
{"from":4, "to":6, "fromPort":"B", "toPort":"T"},
{"from":6, "to":7, "fromPort":"B", "toPort":"T"},
{"from":7, "to":8, "fromPort":"B", "toPort":"T"},
{"from":8, "to":-2, "fromPort":"B", "toPort":"T"},
{"from":-1, "to":0, "fromPort":"B", "toPort":"T"},
{"from":-1, "to":1, "fromPort":"B", "toPort":"T"},
{"from":-1, "to":5, "fromPort":"B", "toPort":"T"},
{"from":5, "to":4, "fromPort":"B", "toPort":"T"},
{"from":0, "to":4, "fromPort":"B", "toPort":"T"}
 ]}
  </textarea>
  <button onclick="printDiagram()">Print Diagram Using SVG</button>
</div>
</body>
</html>
